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Stockholders' Equity (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2012

Dec. 31, 2011

Stockholders' Equity

Schedule of redemption prices per share

Year from November 1, 2011 to October 31, 2012		$	10.18
Year from November 1, 2012 to October 31, 2013		$	10.12
Year from November 1, 2013 to October 31, 2014		$	10.06
November 1, 2014 and thereafter		$	10.00

Year from November 1, 2011 to October 31, 2012		$	10.18
Year from November 1, 2012 to October 31, 2013		$	10.12
Year from November 1, 2013 to October 31, 2014		$	10.06
November 1, 2014 and thereafter		$	10.00

Schedule of conversion of convertible preferred stock

		Year ended December 31, 2010
Preferred shares exchanged		833,671
Common shares issued:
At stated convertible option		50,679
Incremental shares issued under the exchange transaction		185,835
Total common shares issued		236,514

Schedule of warrants outstanding

Issued in Connection With		Expiration Date		Common Shares Issuable		Weighted Average Exercise Price
April 2006 stock issuance		2013		367,347		$	49.00
February 2007 stock issuance		2014		151,773		$	59.08
December 2007 CEFF		2013		14,285		$	9.80
July 2009 Series II stock issuance		2014		98,893		$	7.00
January 2010 stock issuance		2015		101,785		$	22.82
January 2010 stock issuance		2015		100,714		$	19.95
October 2010 stock issuance		2015		594,513		$	13.44
July 2011 stock issuance		2015		544,117		$	9.52

Total				1,973,427		$	22.96

Issued in Connection With		Expiration Date		Common Shares Issuable		Weighted Average Exercise Price
April 2006 stock issuance		2013		367,347		$	49.00
February 2007 stock issuance		2014		151,773		$	59.08
December 2007 CEFF		2013		14,285		$	9.80
July 2009 Series II stock issuance		2014		98,893		$	7.00
January 2010 stock issuance		2015		101,785		$	22.82
January 2010 stock issuance		2015		100,714		$	19.95
October 2010 stock issuance		2015		594,513		$	13.44
July 2011 stock issuance		2016		544,117		$	9.52
Total				1,973,427		$	22.96

Tabular disclosure of information related to converting stock into another financial instrument(s) in a noncash (or part noncash) transaction.

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Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable.

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